Apparatus for molding tires.



F. PAULSEN.

APPARATUS FOR MOLDING TIRES.

APPLICATION FILED APR. 11.1917.

Patented Apr. 16, 1918.

Inventor I 776d. Pea/5,67;

My invention relates to an 'JIQLIQEN'G 'i'lIEtES,

"l, specification 01 Letters lessens.

To all whom may, :10am

Be it known that l, bianosnicic Psnnsnn, a citizen of the United St tes,residing at ll'linneapolis, in the couney of Hennepin and State lilinnesoia, have invented certain new and usefu Improvement in Apparatusfor Molding Til-"es, of which the following a specification,

apparatus for molding tires and has for its ob ect to provide in.combination with usual core 4 form or mold for the tire a supplementalextension member to the inner rim of said mold and made sectional sothat after the laid upon the combined mold formed by the mold propelandthe supplemental section, and said supple, mental section has beenWithdrawn (made possible by its sectional characteristics) and the tireso laid is subjected to outside pres sure from the outer mold, he fabricof the tire will be uniformly stretched over the top and sides, to {befact that the lower poi-tions of the tire laid will be spaced from thecore and are forced inwardly by the clamping mold. is a primary featureof my invention that {no pressure exerted upon the tire outside of thecore shall be a continuing pressure, for which reason the sectionalclamping mold is made in two sections held toge'sne'r in dovetailingrela tion by an annular flange, so that sections do not complete en anytime during); curing plu s, the body oi: the tire thus being}; at alltunes subjected to all of the pressureexoited upon the sections.

The 'lfull objects and advantages of my invention will in connectionwith the delailed desciiptic ticularly oointcd out n the c in theiliusti no; the a plication of invention in one fossil,-

Figures is a (nose cm tire mold e rs v 1th myimprovements attached andslim. ii-

i part of iilci' view e is a plan 1 Fig. of a clamp-- a perspoct thecore alone.

of the extension view of the entire su; g'ieine,

5 illustrates a t'ran's'vc se section lug mold adapted be a; died to thetire after the supplemental :Ecini ring; use been.

withdrawn.

As illustrated, the core ii) is of usual consiruction corresponding inshape to the inside of a finished tire casing and tliercloreInnneteosis, minneso rua.

Patented Ape. lid, libido :ation April 11, 1912". Serial No. 131,167.

having a portion 11 substantially circular in cross-section and an innerportion 12 which is drawn inwardly and downwardly to provide wallsagainst which the lower walls of tire casing may be caused to impinge bythe clamp, said portion 12 having annular base 18 for engagement withthe base of the clamping device.

A supplemental core member 14 is pro vided having a base portion 15 withan outer annular wall 16 adapted to engage the wall 13 of core andanvinner annular wall 1.? which receives a sectional ring 18 bywhich-the supplemental member is secured in position upon the core 10.From the base portion wings 19 and 20 extend outwardly, being formed toreceive portion 12 of the core 10 and in combination therewith toprovide an expanded core of outer contours such as indicated in Fig. 1upon which-the tire 21 is laid in a wel -known Way. As best shown inFig. l, the supplemental core piece 14- is divided into three portedfrom sections 23 and 24 by oblique.

clefts 25 and 26, While sections 23 and 24. are separated from oneanother by a radial cleft 27. The ring 18 is also divided into threesections 28, 29 and 80. The section :28 overlaps the clelts 25 and 26and is separated from sections 29 and 30 by oblique clc'fts 31 and 32.Sections 29 and 30 in turn are separated by a radial cleft 33 which isin elinemcnt with cleft 27. The ring sections are secured to thesupplemental core sections by screw bolts 3% extending through ring 18and threading into the base 15 of supplemental core piece 14.

in assembling the supplemental core piece upon the core 10 the sections23' and 2%, with their attached ring sections 29'. and 30, are first putinto position upon the col-e. The section 522 with its attached section28 is then applied between the obliquely-cleft ends of sections 23, 24:,Z9 --and 30 and the bolts secures the supplemental core piece uponcore-3,0 so as co-make a substantially integral extension thereof.

are screwed into position, which till After tlie tire 21 is laid uponthe coinprovided with annular groove e2 adapted

